12005570785 has 16 divisors (see below), whose sum is σ = 15549483600. Its totient is φ = 8845885440.

The previous prime is 12005570783. The next prime is 12005570791. The reversal of 12005570785 is 58707550021.

It can be written as a sum of positive squares in 8 ways, for example, as 23203489 + 11982367296 = 4817^2 + 109464^2 .

It is not a de Polignac number, because 12005570785 - 2¹ = 12005570783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12005570783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176496 + ... + 234865.

It is an arithmetic number, because the mean of its divisors is an integer number (971842725).

Almost surely, 2^12005570785 is an apocalyptic number.

It is an amenable number.

12005570785 is a deficient number, since it is larger than the sum of its proper divisors (3543912815).

12005570785 is a wasteful number, since it uses less digits than its factorization.

12005570785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411828.

The product of its (nonzero) digits is 98000, while the sum is 40.

The spelling of 12005570785 in words is "twelve billion, five million, five hundred seventy thousand, seven hundred eighty-five".